CN102954081B - For the pin of planetary gear system - Google Patents

For the pin of planetary gear system Download PDF

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Publication number
CN102954081B
CN102954081B CN201210293259.0A CN201210293259A CN102954081B CN 102954081 B CN102954081 B CN 102954081B CN 201210293259 A CN201210293259 A CN 201210293259A CN 102954081 B CN102954081 B CN 102954081B
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CN
China
Prior art keywords
pin
frame
planetary gear
compliance
gear
Prior art date
Application number
CN201210293259.0A
Other languages
Chinese (zh)
Other versions
CN102954081A (en
Inventor
D.J.埃尔诺
D.L.霍尔曼
F.J.洛佩斯
Original Assignee
通用电气公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Priority to US13/210,761 priority Critical
Priority to US13/210761 priority
Priority to US13/210,761 priority patent/US8550955B2/en
Application filed by 通用电气公司 filed Critical 通用电气公司
Publication of CN102954081A publication Critical patent/CN102954081A/en
Application granted granted Critical
Publication of CN102954081B publication Critical patent/CN102954081B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/08General details of gearing of gearings with members having orbital motion
    • F16H57/082Planet carriers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D15/00Transmission of mechanical power
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D15/00Transmission of mechanical power
    • F03D15/10Transmission of mechanical power using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00Function
    • F05B2260/30Retaining components in desired mutual position
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00Function
    • F05B2260/40Transmission of power
    • F05B2260/403Transmission of power through the shape of the drive components
    • F05B2260/4031Transmission of power through the shape of the drive components as in toothed gearing
    • F05B2260/40311Transmission of power through the shape of the drive components as in toothed gearing of the epicyclic, planetary or differential type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/2809Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels
    • F16H1/2836Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels by allowing limited movement of the planets relative to the planet carrier or by using free floating planets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/48Special means compensating for misalignment of axes, e.g. for equalising distribution of load on the face width of the teeth
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The present invention relates to and disclose a kind of pin for planetary gear to be connected to frame in planetary gear system.The pin includes first end, the second end, and the outer surface extended between the first end and second end.In certain embodiments, the pin further includes the component design of the compliance for changing the pin for the joint between the pin and the frame.In other embodiments, the pin further includes the compliance feature being located in the outer surface, and the compliance feature can make the compliance of the pin on tangential than diametrically more preferably.

Description

For the pin of planetary gear system

Technical field

The present invention relates generally to planetary gear system, connects planetary gear in particular in planetary gear system It is connected to the pliable pin of frame.

Background technology

Wind energy is considered as to be currently available that one of most cleaning, most environmentally friendly energy, and in this regard, wind energy conversion system has been obtained Extensive concern.Modern wind turbine generally includes tower, generator, gear-box, cabin and one or more pieces rotor blades.Rotor Blade captures the kinetic energy of wind using known fin principle.Rotor blade transmits kinetic energy in the form of rotating energy, so that axle turns Dynamic, rotor blade is connected to gear train by the axle, or if gear train is not used, is then directly connected to generator. Afterwards, mechanical energy is changed into electric energy by generator, so as to be transported in public utility electrical grid.

In gear train, especially planetary gear system, the rodent population of adjacent gear is correctly aligned in reasonable layout It is particularly significant for load.However, in current many gear trains, various designs and operation factors cause that engaging tooth cannot be just Really it is aligned.For example, for generally with the involute gear profile with involute gear teeth various gears for, its manufacture and Tolerances in design may cause to be misplaced between the engaging tooth of adjacent gear.Additionally, particularly with the gear train in wind energy conversion system For, all parts of gear train, such as frame are twisted and/or bent during running.This torsion and bending are usual It is to be caused by the load and its torsion and bending of the input shaft of gear train.Torsion and bending can cause adjacent teeth in gear train There is extra dislocation between the engaging tooth of wheel.

For gear train, and in wind energy conversion system setting for wind energy conversion system itself, adjacent teeth in gear train Dislocation between wheel likely results in catastrophic effect.For example, dislocation can cause the load that each gear in gear train bears It is more than two times bigger than the design (calculated) load limit or twice.Therefore, the gear for bearing this increased load can in gear train operation Can damage or break down, be broken down so as to likely result in gear train.

Therefore, a kind of improved gear train, such as improved planetary gear system are needed in art.For example, tool The gear train for having improved load distribution feature will be with advantage.

The content of the invention

Part is illustrated each aspect of the present invention and advantage by description below, or, these aspects and advantage are in specification In be probably it will be apparent that or can be derived by putting into practice the present invention.

In one embodiment, a kind of pin for planetary gear to be connected to frame in planetary gear system is disclosed. The pin includes first end, the second end, and the outer surface extended between the first end and second end.The pin enters One step includes the component or design of the compliance for the joint change pin between the pin and the frame.Described Pin, wherein the outer surface includes the first end surfaces extended from first end and the middle table extended from first end surfaces Face, first end surfaces are configured to be closed with the bridge joint.Wherein described outer surface is further included in the intermediate surface The second end surfaces extended and second end between, second end surfaces are configured to be closed with the bridge joint.

Described pin, wherein the design includes the passage being located in first end surfaces, the passage is around described Peripheral at least a portion ring-type of the first end surfaces extends.Further include multiple passages.Wherein described passage be open or Closure.

Wherein described component or design include first end surfaces, and first end surfaces have by the first end The cross section profile of at least one of reduction of the axial length on surface.Wherein described first end surface along the reduction section At least a portion of profile is gradually reduced.

Wherein described pin be further provided with drilling, it is described drilling extend from the first end substantially along center planet axis and to Least partially penetrate the pin.Wherein described pin is further provided with drilling, and the drilling extends through the outer surface generally laterally Against center planet axis.

Described pin, wherein the design can make the compliance of the pin on tangential than diametrically more preferably.

In another embodiment, disclose a kind of for planetary gear to be connected into frame in planetary gear system Pin.The pin includes first end, the second end, and the outer surface extended between the first end and second end.It is described Pin further includes the compliance feature that is located in the outer surface, and the compliance feature can be such that the compliance of the pin compares on tangential Diametrically more preferably.Wherein described compliance feature includes passage, peripheral at least one of the passage around the outer surface Ring-type is divided to extend.

Described pin, further includes multiple passages.Wherein described compliance feature includes the outer surface, the outer surface The cross section profile of at least one of reduction with the axial length by the outer surface.Described pin, wherein described outer Surface is gradually reduced along at least a portion of the cross section profile of the reduction.Wherein described pin is further provided with drilling, the brill Hole extends and at least partially across the pin substantially along center planet axis from the first end.Wherein described pin is further provided with boring Hole, the drilling extends through the outer surface generally laterally against center planet axis.

A kind of planetary gear system is further disclosed, it includes:It is provided with the planetary gear of center planet axis;Frame, its It is arranged adjacent at least one planetary gear;Pin, it extends through the planet substantially along the center planet axis from the frame Gear, the pin includes first end, the second end and the outer surface extended between the first end and second end;And Change the component or design of the compliance of the pin for the joint between the pin and the frame.

With reference to detailed description below and appended claims can be more fully understood from it is of the invention these and Other features, aspect and advantage.Accompanying drawing is incorporated in this specification and constitutes the part of this specification, illustrates of the invention each Embodiment, and principle of the invention is explained together with specific embodiment.

Brief description of the drawings

This specification refer to the attached drawing, for those skilled in the art, completely and discloses this hair with can realizing in detail It is bright, including its optimal mode, wherein:

Fig. 1 is the perspective view of the wind energy conversion system of an embodiment of the invention;

Fig. 2 is the decomposition diagram of the planetary gear system of an embodiment of the invention;

Fig. 3 is the perspective view of the pin of an embodiment of the invention;

Fig. 4 is the perspective view of the pin of another embodiment of the invention;

Fig. 5 is the perspective view of the pin of another embodiment of the invention;

Fig. 6 is the perspective view of the pin according to another embodiment of the invention;And

Fig. 7 is the perspective view of the pin of another embodiment of the invention.

Component symbol list:

Specific embodiment

Now with detailed reference to various embodiments of the present invention, one or more realities of the embodiment of the present invention will be shown in accompanying drawing Example.Each example is used to explain the of the invention and non-limiting present invention.In fact, before the scope of the present invention or spirit is not departed from Put, those skilled in the art can make various modifications and variations to the present invention easily.For example, as embodiment The characteristic of part explanation or description can be used in other embodiment, so as to obtain another embodiment.Therefore, the present invention should be contained The all modifications and variations based in the range of appended claims and its equivalent of lid.

Fig. 1 is shown using the wind energy conversion system 10 of traditional structure.Wind energy conversion system 10 includes tower 12, installs organic in the tower Cabin 14.Multi-disc rotor blade 16 is installed to rotor hub 18, and the rotor hub in turn is connected to rotate the main method of main rotor shaft Lan Shang, as mentioned below.Wind turbine power generation and control unit are arranged in cabin 14.Fig. 1 purposes for illustrative purposes only, with exemplarily Illustrate the present invention.It will be appreciated that being configured the invention is not restricted to any certain types of wind energy conversion system.

Fig. 2 illustrates an embodiment of planetary gear system of the invention 20.Input shaft (not shown) can be to being System 20 provides input load.In the embodiment during system 20 is included in wind energy conversion system 10, system 20 (can not schemed to generator Show) output loading is provided, it is such as known in art.Therefore, during running, born with the input of specific input rotary speed Load is transmitted through planetary gear system 20 and is supplied to generator as the output loading with specific output rotary speed.

During running, input shaft may bear various loads.For example, input shaft can bear bending during running bearing Carry.It is advantageous that planetary gear system of the invention 20 includes improved load distribution feature, as mentioned below.These loads Distribution characteristics can be reduced or avoided all parts of planetary gear system and bear because caused by transmission bending load or other loads The load for misplacing and increasing.Additionally, all parts that these load distribution features can be reduced or avoided planetary gear system bear The load increased by dislocation caused by manufacture and tolerances in design.By the way that all parts of system 20 are reduced or avoided, for example respectively The load of such increase of individual gear, improved load distribution feature can increase the life-span of system 20, and in some embodiments In, the life-span of the wind energy conversion system 10 comprising system 20 can be increased.

In the exemplary embodiment, planetary gear system 20 is single planetary gear train system 20.Therefore, it is input into rotary speed Output rotary speed can be converted to by each coupling gear of single-stage, as mentioned below.However, planetary gear system 20 or Or multiple-stage planetary gear train system 20, and input rotary speed can be converted to output rotation by each multistage coupling gear Speed.

Planetary gear system 20 includes frame 24 and multiple gears.For example, the planetary gear system 20 in exemplary embodiment It show including gear ring 26, one or more planetary gears 28 and central gear 30.System 20 may include one, two, three It is individual, four, five, six, seven, eight or eight are with upper planetary gear 28.Each gear in gear 26,28,30 is wrapped Include multiple teeth.For example, gear ring 26 includes tooth 32, each planetary gear 28 includes tooth 34, and each central gear 30 includes tooth 36. Tooth 32,34 and 36 is adjusted by size and Adjusting Shape is to mesh together, so that each gear 26,28 and 30 is matched somebody with somebody each other Close.For example, gear ring 26 and central gear 30 can coordinate planetary gear 28.

In certain embodiments, frame 24 can be fixed.In these embodiments, input shaft may be connected to gear ring 26, and defeated Entering the input load on axle can be transferred to planetary gear 28 by gear ring 26.Therefore, gear ring 26 can drive system 20.In other realities Apply in example, gear ring 26 can be fixed.In these embodiments, input shaft may be connected to frame 24, and the input load on input shaft Planetary gear 28 can be transferred to by frame 24.Therefore, frame 24 can drive system 20.In other embodiments, planetary gear 28 or The grade of central gear 30 any other suitable part can drive system 20.

Central gear 30 in exemplary embodiment is provided with central shaft 40, and is rotated hence around the central shaft 40.Gear ring 26 at least partially about central gear 30, and can place along central shaft 40.For example, gear ring 26 can be directed at sun tooth along central shaft 40 Wheel 30, or central gear 30 can be deviateed along axle 40.Therefore, gear ring 26 can (if rotatable) rotated around central shaft 40.

Each planetary gear in planetary gear 28 may be provided between central gear 30 and gear ring 26, and can coordinate simultaneously Central gear 30 and gear ring 26.For example, tooth 32,34 and 36 engageable ins are together, as described above.Additionally, in planetary gear 28 Each planetary gear can be provided with center planet axis 42, as shown in the figure.Therefore, each planetary gear 28 can be around its center planet Axle 42 rotates.In addition, planetary gear 28 and its center planet axis 42 can rotate around central shaft 40.

Frame 24 can be set to nearbypiston gear 28, and further can be placed along central shaft 40.Frame 24 may include first Plate 44, and in certain embodiments, it may include the second frame plate (not shown).Include the first frame plate 44 and the second frame plate in frame 24 In embodiment, planetary gear 28 may be provided between two frame plates.

Each planetary gear 28 of the invention may be connected to frame 24.For example, pin 50 can extend across frame 24 and planetary gear 28 at least a portion, so as to planetary gear 28 and frame 24 be linked together.Xiao50Ke Yan centers planet axis 42 extend and put Put, so, planetary gear 28 can rotate around pin 50.

As shown in FIG. 3 to 7, pin 50 may include first end 52, the second end 54, and in the foregoing appearance for extending between the two Face 56.Pin 50 can further include for changing, for example, increase or decrease that various components or structure of the compliance of pin 50 set Meter.The design of these components advantageously can provide improved load distribution feature to planetary gear system 20.For example, it is of the invention this Class design can allow pin 50 during system 20 is run with compliance or compatibility.This compliance or compatibility can allow each of system 20 Individual gear keeps being correctly aligned each other during running, and manufacture and the tolerances in design of each gear that need not worry, without Gu The load of worry system 20.The load distribution between each planetary gear 28 can be so improved, and along and about planet tooth The load distribution on the surface of wheel 28.

Such component for changing the compliance of pin 50 or design may include the compliance feature being located in outer surface 56 or Any compatible features.Fig. 3 to 7 illustrates the multinomial embodiment of compliance feature, as mentioned below.Additionally, the compliance for changing pin 50 Component or design may be provided in any suitable position on the outer surface 56 of pin 50.For example, in certain embodiments, it is such to set The joint that meter is placed between pin 50 and frame 24, the frame such as the first frame plate 44 and/or the second frame plate, as mentioned below. In other embodiments, such design is placed in the joint between pin 50 and planetary gear 28, or the outer surface for being placed in pin 50 Any other suitable position on 56.

Joint between pin 50 and frame 24 may be provided in the inner surface (not shown) of the pin-and-hole 60 of frame 24 and the appearance of pin 50 Between the part in face 56.For example, outer surface 56 may include the first end surfaces 62 extended from first end 52.First end surfaces 62 Can be configured and engaged with frame 24, and therefore can be engaged with frame 24 when the pin-and-hole 60 of frame 24 is inserted.Specifically, first end table The adjusting of face 62 and shape are to be assembled in pin-and-hole 60.

Outer surface 56 can further include intermediate surface 64.Intermediate surface 64 can extend from the first end surfaces 62.At some In embodiment, intermediate surface 64 can extend to the second end 54 from the first end surfaces 62.In these embodiments, pin 50 can be cantilever Formula, as mentioned below.In other embodiments, outer surface 56 can further include the second end surfaces 66.Second end surfaces 66 can Extend between the end 54 of intermediate surface 64 and second.In these embodiments, the first end surfaces 62 can be engaged with the first frame plate 44, Second end surfaces 66 can be engaged with the second frame plate.

In certain embodiments, pin of the invention 50 can be fixedly installed on frame 24.For example, pin 50 can be press-fitted into frame 24 In, can be used adhesive or machanical fastener to be fixed, or be otherwise fixedly installed on frame.However, pin 50 or Person is also movably mounted to frame 24, and such pin 50 can rotate relative to frame 24.

In certain embodiments, one of end 54 of first end 52 or second is only supported.For example, first end 52 can be by first Frame plate 44 is supported, and the second end 54 is not affected by the support of the second frame plate.Or, first end 52 can not be supported, and support the second end 54. Only one end of supporting pin 50 is so that pin 50 turns into cantilevered pin 50 and can further increase the compliance of pin 50.In alternative embodiments, The end 54 of first end 52 and second can be simultaneously supported, for example, being supported by the first frame plate 44 and the second frame plate.

Fig. 3 to 6 illustrates every embodiment of the passage 70 of the compliance for changing pin 50.For example, as illustrated, one Or during multiple passages 70 may be provided in outer surface 56, for example, it is located at the first end surfaces 62, the second end surfaces 66 and/or intermediate surface 64 In.In certain embodiments, as illustrated, one or more passages 70 can be around outer surface 56 or some of peripheries extremely A few part substantially ring-type extends.For example, Fig. 3 and 6 illustrates passage 70, the passage is located in the first end surfaces 62, and is enclosed Whole periphery substantially ring-type around outer surface 56 extends.Figure 4 and 5 are illustrated and are located in the first end surfaces 62 and the second end surfaces 66 Multiple passages 70, each passage 70 around the appropriate section of outer surface 56 a peripheral part substantially ring-type extend.

In certain embodiments, as shown in Fig. 3,4 and 6, passage 70 can be close passage 70.In these embodiments, outward Surface 56 generally continuously passes through passage 70, opening is generally not present in such passage 70 and is broken.In other embodiments, such as Shown in Fig. 5, passage 70 can be opening passage 70.In these embodiments, outer surface 56 is not continuously across passage 70, and its Include opening and fracture.

Note that every embodiment of the passage 70 that explanation is located in pin 50 further illustrates outer surface 56 or wherein has There is the part of the cross section profile of reduction.In other words, the cross section profile part of reduction is defined by passage or each passage 70.Fig. 6 and 7 figures Other every embodiments of the pin 50 of the part including outer surface 56 or wherein with the cross section profile for reducing are shown.It is specific and Speech, Fig. 6 and 7 illustrates outer surface 56 or wherein has the part of the cross section profile for reducing, and the outer surface or part are not provided with Passage.For example, as illustrated, the first end surfaces 62 and/or the second end surfaces 66 can have the cross section profile for reducing.These reduce Cross section profile can extend across the axial length 74 and/or 76 of the end surfaces 66 of corresponding first end surfaces 62 and/or second extremely A few part.Additionally, the cross section profile for reducing may extend to the end 54 of first end 52 and/or second.

Additionally, in certain embodiments, outer surface 56 includes that a part for the cross section profile for reducing can have certain cone Degree.For example, the first end surfaces 62 and/or the second end surfaces 66 can along a part for the cross section profile for reducing or it is whole reduce cut Facial contour is gradually reduced.

In some exemplary embodiments, compliance feature etc. can allow pin for changing the component or design of the compliance of pin 50 50 compliance in one direction than on other direction more preferably.Fig. 4 to 7 illustrates wherein compliance and (is being cut on tangential 82 Upwards linearly or around radially rotatably) than radially on 84 (i.e. diametrically linearly or around tangentially rotatably) More preferably every embodiment.It is to be understood that the invention is not restricted to realize that compliance increases on tangential relative to radial direction, relative to one Realize that any suitable compliance is increased or decreased within the scope and spirit of on other direction in individual direction.

For example, Figure 4 and 5 illustrate the opposing channel 70 for being placed in the opposite side of pin 50.In these embodiments, any passage 70 Or other features are not connected with these opposing channels 70.Opposing channel 70 can be relative to generally perpendicular to the side of opposing channel 70 To such as radial direction 84 on by the direction of opposing channel 70, such as realizes that compliance increases on as depicted tangential 82.

Fig. 6 illustrates the passage 70 extended around outer surface 56 or some of whole peripheral annulars.In addition, such as figure institute Show, the opposite segments of passage 70 are deeper than other opposite segments 70.The change in depth of passage 70 can allow relative to generally perpendicular to The direction of shallower part, such as radial direction 84, on the direction by deeper portion, such as realize that compliance increases on shown tangential 82 Plus.

Fig. 6 and 7 illustrates the part with the cross section profile for reducing in outer surface 56.Additionally, as illustrated, surface 56 or Some of opposite segments may have the reduction amount bigger than other opposite segments.The size variation of these section reduction amounts Can allow relative to generally perpendicular to reduction amount large area and/or the direction by reduction amount smaller area, such as radially 84, On by the direction of reduction amount large area, such as realize that compliance increases in shown tangential direction 82.

In certain embodiments, potentially included in pin 50 or be provided with various other features, be used to change, for example, increased, sold 50 compliance.For example, pin 50 can be provided with one or more drillings.Each drilling can at least partly extend through pin 50.For example, such as Shown in Fig. 3 and 5, drilling 92 can extend along center planet axis 42.In certain embodiments, drilling 92 can be from the second end 54 towards the One end 52 extends, and in other embodiments, drilling 92 can extend from first end 52 towards the second end 54.Additionally or alternatively, As shown in figure 4, drilling 94 generally laterally can extend against center planet axis 42, and through outer surface 56 or any of which part. Such drilling 92 and/or 94 is reduced and is made quantity of material necessary to pin 50, and can further increase the compliance of pin 50.

The present invention, including optimal mode are disclosed this specification has used various examples, at the same also allow art appoint What technical staff can put into practice the present invention, including manufacture and use any device or system, and implement any side covered Method.Protection scope of the present invention is defined by tbe claims, and may include other examples that those skilled in the art finds out. If the structural element of other such examples is identical with the letter of claims, or if such example include it is equivalent The letter of structural element and claims falls within the scope of claims without essential difference, then such example.

Claims (13)

1. one kind is used to be connected to planetary gear (28) in planetary gear system (20) pin (50) of frame (24), the pin (50) include:
First end (52);
Second end (54);
Outer surface (56), it extends between the first end (52) and second end (54), and outer surface is included from first end The first end surfaces for extending and the second end surfaces extended from the second end, the first end surfaces are combined with frame;
Change the design of the compliance of the pin (50) for the joint between the pin (50) and the frame (24), and
Extend through first end surfaces generally laterally against the pin center planet axis drilling.
2. pin (50) according to claim 1, wherein the outer surface (56) from the first end (52) including extending First end surfaces (62) and the intermediate surface (64) extended from first end surfaces (62), the first end surfaces (62) warp Configuration is engaged with the frame (24).
3. pin (50) according to claim 2, wherein the outer surface (56) are further included in the intermediate surface (64) and second end (54) between extend the second end surfaces (66), second end surfaces (66) be configured to it is described Frame (24) is engaged.
4. pin (50) according to claim 2, wherein the design include being located at it is logical in first end surfaces (62) Road (70), the passage (70) extends around peripheral at least a portion ring-type of first end surfaces (62).
5. pin (50) according to claim 4, further includes multiple passages (70).
6. pin (50) according to claim 2, wherein the design includes first end surfaces (62), the first end Surface has the cross section profile of at least one of reduction by the axial length (74) of first end surfaces (62).
7. pin (50) according to claim 6, wherein the first end surface (62) is along the cross section profile of the reduction At least a portion is gradually reduced.
8. pin (50) according to any claim in claim 1 to 7, wherein the pin (50) is further provided with drilling (92), the drilling (92) extends and at least partially across the pin substantially along center planet axis (42) from the first end (52) (50)。
9. pin (50) according to any claim in claim 1 to 7, wherein the design can make the pin (50) Compliance compares on radially (84) more preferably on tangential (82).
10. one kind is used to be connected to planetary gear (28) in planetary gear system (20) pin (50) of frame (24), the pin (50) include:
First end (52);
Second end (54);
Outer surface (56), it extends between the first end (52) and second end (54), and outer surface is included from first end The first end surfaces for extending and the second end surfaces extended from the second end, the first end surfaces are combined with frame;
The compliance feature in the outer surface (56) is located at, the compliance feature can make the compliance of the pin (50) in tangential (82) It is upper to compare on radially (84) more preferably,
And extend through first end surfaces generally laterally against the pin center planet axis drilling.
11. pins (50) according to claim 10, wherein the compliance feature includes passage (70), the passage (70) is enclosed Peripheral at least a portion ring-type around the outer surface (56) extends.
12. pins (50) according to claim 10, wherein the compliance feature includes the outer surface (56), the appearance Face has the cross section profile of at least one of reduction by the axial length of the outer surface (56).
13. pin (50) according to any claim in claim 10 to 12, wherein the pin (50) is further provided with Drilling (92), the drilling (92) extends and at least partially across institute substantially along center planet axis (42) from the first end (52) State pin (50).
CN201210293259.0A 2011-08-16 2012-08-16 For the pin of planetary gear system CN102954081B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/210,761 2011-08-16
US13/210761 2011-08-16
US13/210,761 US8550955B2 (en) 2011-08-16 2011-08-16 Pin for planetary gear system

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CN102954081A CN102954081A (en) 2013-03-06
CN102954081B true CN102954081B (en) 2017-06-30

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